CN104835547A - Multi-blade collimator - Google Patents
Multi-blade collimator Download PDFInfo
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- CN104835547A CN104835547A CN201410048004.7A CN201410048004A CN104835547A CN 104835547 A CN104835547 A CN 104835547A CN 201410048004 A CN201410048004 A CN 201410048004A CN 104835547 A CN104835547 A CN 104835547A
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- blade
- blade mechanism
- rotary table
- annular rotary
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
- G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
- G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
- G21K1/025—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation
Abstract
The invention provides a multi-blade collimator, which comprises a first blade mechanism and a second blade mechanism installed on a main frame along a first direction, wherein the first blade mechanism includes a plurality of blades for forming a first radial field; a second blade mechanism includes a plurality of blades for forming a second radial field; the first blade mechanism rotates around a second axial direction; and at least parts of the projections of the first radial field and the second radial field overlap along the second axial direction. In the technical scheme above, the overlapped part, of the first radial field and the second radial field along the second axial direction, is the final radial field of the multi-blade collimator. The first blade mechanism can rotate around the second axial direction to allow the multi-blade collimator to adjust the shape of the overlapped part of the first radial field and the second radial field according to the shape required by a radiated part and through adjusting a rotation angle of the first blade mechanism. Therefore, the radial structure finally formed of the multi-blade collimator is adjusted, so that an adaptive shape degree of the radial filed of the multi-blade collimator is improved.
Description
Technical field
The present invention relates to medical instruments field, particularly relate to a kind of multi-diaphragm collimator.
Background technology
Collimating apparatus is the radiation head building block of medical radiotherapy instrument, comprises example of primary collimator, secondary collimator, multi-diaphragm collimator (or being called multi-leaf optical grating).
Shown in figure 1, the shape of the radiation open country 12 that multi-diaphragm collimator is formed for the radioactive ray adjusting radiation source 10.Multi-diaphragm collimator generally includes multipair blade 11, and described multipair blade 11 arranges around radiation source 10 center.As in radioactive ray tumor therapeutic procedure, the motion that the direction of ray that every sheet blade 11 all can produce perpendicular to radiation source 10 is separate, thus form the radiation open country 12 closed being modeled to tumor shape, in order to avoid the health tissues around tumour is subject to x radiation x.
In multi-diaphragm collimator, blade is thinner, and quantity is more, and the Adjustment precision of the radiation open country 12 of multi-diaphragm collimator is higher, and the conformal degree for tumour is higher.But blade is thinner, blade processing difficulty is larger, and precision controlling is more difficult, and the corresponding blade supporting structure design such as drives structure as blade and difficulty of processing also strengthen, and not only increase manufacturing cost, and in use procedure, the failure rate of multi-diaphragm collimator strengthen.In addition, blade is thinner, and quantity is more, and the leakage between blade is penetrated and increased, and affects the shield effectiveness of multi-diaphragm collimator for radiation.
For this reason, as Siemens Company provides a kind of double-deck multi-leaf optical grating structure.As shown in Figure 2: described two-layer multi-leaf optical grating structure comprises the twi-tier blade assembly 13(bold portion be arranged in parallel perpendicular to directions of rays) and 14(dotted portion).Every one deck blade assembly, comprises two groups of blades staggered relatively.The blade of every one deck vane group is along moving perpendicular to directions of rays, thus it is wild to form respective radiation, and by two-layer different radiation open country superposition, forms final radiation wild.In said structure, the blade of different layers can stop that in another layer of vane group, gap is penetrated in the interlobate leakage of adjacent two panels, to solve the problem that between blade, leakage is penetrated and rubbed, the scheme of two-layer different radiation open country superposition in addition improves the conformability of the final radiation open country formed to a certain extent.
Compared to individual layer multi-leaf optical grating structure, above-mentioned double-deck multi-leaf optical grating effectively can alleviate the problem of leaking between each blade in individual layer double leaf optical grating construction and establishing and rubbing, and the wild overlaying scheme of two-layer radiation of double-deck multi-leaf optical grating can improve the wild conformal degree of individual layer radiation, thus the thickness of blade relatively can be increased under the requirement of identical conformal degree, the quantity of less blade, thus reduction manufacturing cost, and failure rate.
But in existing double-deck multi-leaf optical grating, the moving direction of two-layer vane group Leaf is single, thus has specific curvature for periphery, periphery is that the conformal degree adjustment of erose tumour is poor.For this reason, the conformal degree adjustment capability how improving the radiation open country of multi-diaphragm collimator is further the problem that those skilled in the art need solution badly.
Summary of the invention
The problem that the present invention solves is to provide a kind of multi-diaphragm collimator, to improve the conformal degree of the radiation open country formed between each blade of multi-diaphragm collimator.
For solving the problem, the invention provides a kind of multi-diaphragm collimator, comprising:
Main body rack;
Be arranged on described main body rack, and along first direction arrange the first blade mechanism and the second blade mechanism;
Described first blade mechanism comprises more blades, wild for the formation of the first radiation;
Described second blade mechanism comprises more blades, wild for the formation of the second radiation;
Described first blade mechanism is around the second axial-rotation, and described second is axially parallel to described first direction;
Described first radiation open country and the wild small part that is projected to along described second axis of the second radiation overlap.
Alternatively, described first blade mechanism comprises annular rotary table, and the blades installation of described first blade mechanism is on described annular rotary table;
The sidewall of described annular rotary table is provided with grinding tooth band;
On described main body rack, the side being positioned at described annular rotary table is provided with driven wheel, and the grinding tooth of described driven wheel engages with the grinding tooth band of described annular rotary table;
Described main body rack is provided with the motor for driving described pinion rotation.
Alternatively, on described annular rotary table, offer the opening axially running through described annular rotary table along described second, the blade of described first blade mechanism is positioned at described open circumferential.
Alternatively, described first blade mechanism comprises two groups of blade assemblies, and described two groups of blade assemblies are positioned at the relative both sides of described opening;
One group of blade assembly comprises mounting bracket, and is arranged on the more blades on described mounting bracket;
Described first blade mechanism also comprises for controlling described two groups of blade assemblies independently along the drive unit of the closure movement of described two groups of blade assemblies.
Alternatively, described drive unit comprises the leading screw driven unit that two covers are respectively used to control described two groups of blade assembly movements;
A set of described leading screw driven unit comprises the nut be fixed on corresponding mounting bracket, be fixed on leading screw on described annular rotary table and motor;
The closure being axially parallel to described two groups of blade assemblies of described leading screw;
Described nut is arranged on described leading screw, and described motor, for driving described leading screw around axial-rotation, moves along the axis of described leading screw to drive described nut.
Alternatively, in described two groups of blade assemblies, the more blades on each group blade assembly is perpendicular to the closure arranged in parallel of described two groups of blade assemblies, and each described blade can move along the closure of described two groups of blade assemblies independently.
Alternatively, described annular rotary table is provided with the guide rail that the closure along described two groups of blade assemblies extends;
Described mounting bracket is positioned on described guide rail, and described mounting bracket can move along described guide rail bearing of trend.
Alternatively, described annular rotary table is provided with two described guide rails, described two groups of blade assemblies lay respectively on described two guide rails.
Alternatively, described annular rotary table is connected by bearing arrangement with main body rack.
Alternatively, when the blade of described second blade mechanism is parallel with the blade on the first blade mechanism, the blade on the blade of described second blade mechanism and the first blade mechanism along described first direction in being staggered.
Alternatively, described second blade mechanism comprises and is fixed on shaft collar on described main body rack, and each blades installation of described second blade mechanism is on described shaft collar;
Described shaft collar is parallel with described annular rotary table.
Compared with prior art, the technical scheme of multi-diaphragm collimator of the present invention has the following advantages:
Multi-diaphragm collimator provided by the invention comprises the first blade mechanism and the second blade mechanism that arrange along first direction; The more blades of described first blade mechanism is wild for the formation of the first radiation, and the more blades of the second blade mechanism is wild for the formation of the second radiation; Described second blade mechanism is around the second axial-rotation being parallel to first direction, and the first radiation is wild and the second radiation is wild overlapping at least partly.In technique scheme, the part of described first launched field and the second launched field overlap is that the final radiation of multi-diaphragm collimator is wild, described first blade mechanism can around the second axial-rotation, make described multi-diaphragm collimator can the shape at radiation position as required, by adjusting the described first blade mechanism anglec of rotation, to adjust the first launched field and the second launched field lap shape, namely adjust the structure of the launched field of multi-diaphragm collimator final molding, and then the conformal degree of the launched field of raising multi-diaphragm collimator.
Described first blade mechanism and the second blade mechanism blade are staggered at least partly along first direction, thus make the blade in the blade in the first blade mechanism and the second blade mechanism at least can fill up along described first direction the portion gap formed between the more blades of blade mechanism each other, thus reduce the amount of the leak ray of described multi-diaphragm collimator.
Further, described first blade mechanism (with the second blade mechanism) comprises two groups of blade assemblies, and described two groups of blade assemblies can move along both closure independently; And each blade in two groups of blade assemblies also can move along being parallel to described two groups of blade assembly closures independently.Radiate in open country (wild with the second radiation) process in adjustment first, can first by the position of adjustment blade assembly, adjust the position of each group of blade assembly blade afterwards again, thus effectively improve the convenient degree of the conformal degree adjustment of the first radiation wild (with wild with the second radiation).
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing radiation cure equipment;
Fig. 2 is the schematic diagram of existing two-layer multi-leaf optical grating structure;
The structural representation of Fig. 3 multi-diaphragm collimator one of the present invention embodiment;
Fig. 4 is the side structure schematic diagram of multi-diaphragm collimator in Fig. 3;
Fig. 5 is the first blade mechanism structural representation of multi-diaphragm collimator in Fig. 3;
Fig. 6 is the first blade mechanism of multi-diaphragm collimator in Fig. 3 and the structural representation of the second blade mechanism.
Embodiment
As described in the background art, the conformal degree of multi-diaphragm collimator depends on vane thickness and the quantity of multi-diaphragm collimator.Wherein, blade is thinner, and quantity is more, and the conformal degree of multi-diaphragm collimator is better.But blade is thinner, quantity is more, preparation technology's difficulty of multi-leaf collimator is higher.For this reason, in prior art, adopt and comprise a kind of double-deck multi-leaf optical grating structure.Described double-deck multi-leaf optical grating structure comprises the two-layer blade assembly arranged perpendicular to directions of rays, and the radiation that every one deck blade assembly all can form given shape is wild, and by two-layer different radiation open country superposition, wild to form final radiation.Compare and individual layer multi-leaf optical grating structure, the conformal degree of double-deck multi-leaf optical grating is higher.But single based on the moving direction of two-layer vane group Leaf, limited for the wild conformal degree adjustment capability of radiation, have specific curvature for some peripheries, periphery is erose tumour, the wild conformal degree of radiation of existing double-deck multi-leaf optical grating is still poor.
For this reason, the invention provides a kind of multi-diaphragm collimator, compare and existing multi-diaphragm collimator, effectively can improve the conformal degree that radiation is wild.For enabling above-mentioned purpose of the present invention, feature and advantage more become apparent, and are described in detail specific embodiments of the invention below in conjunction with accompanying drawing.
The structural representation of the multi-diaphragm collimator that Fig. 3 ~ Fig. 6 provides for the present embodiment.
Shown in first reference diagram 3, the multi-diaphragm collimator that the present embodiment provides comprises main body rack 100.
Twi-tier blade mechanism is provided with along first direction at described main body rack 100.Described twi-tier blade mechanism comprises the first blade mechanism 30 and the second blade mechanism 40.
In the present embodiment, described first direction is in radiotherapy equipment, and the line direction of radiation source and multi-diaphragm collimator, the x radiation x that described radiation source sends refers on described multi-diaphragm collimator.For convenience of description, in the present embodiment, with overshoot source, and be first direction perpendicular to the direction at the straight line place of the plane at multi-leaf optical grating place.
In the present embodiment, described first blade mechanism 30 is vertically positioned at above described second blade mechanism 40.
Wherein, described first blade mechanism 30 and the second blade mechanism 40 include more blades.More blades in described first blade mechanism 30 is wild for the formation of the first radiation; More blades in described second blade mechanism 40 is wild for the formation of the second radiation.Described first radiation is wild and the second radiation open country is vertically overlapping at least partly, and the radiation open country that to be the present embodiment multi-diaphragm collimator final, the radiation open country after overlap.
In the present embodiment, described first blade mechanism 30 can around the second axial A to rotation, and described second axial A is to being parallel to vertical direction.
During use, if each leaf position of described second blade mechanism 40 is fixed, second radiation is wild fixed-type, now, described first blade mechanism 30 rotates to relative to described second blade mechanism 40 around A, also namely each blade of described first blade mechanism 30 rotates around described second blade mechanism, the anglec of rotation of the first blade mechanism 30 described in the shape adjustments at radiation position as required, and the position of each blade on described first blade mechanism 30, can on the basis that the second radiation is wild, described second radiation open country is modified, to improve the conformal degree of the radiation open country of final molding.
In conjunction with reference to shown in figure 3 and Fig. 4, in the present embodiment, described first blade mechanism 30 comprises annular rotary table 33.The more blades of described first blade mechanism 30 is positioned on described annular rotary table 33.
Described annular rotary table 30 is horizontally disposed with, and is arranged on described main body rack 100 by bearing arrangement.Particularly, the outer ring of described bearing arrangement is fixed on described main body rack 100, and the inner ring of bearing arrangement is enclosed within the sidewall of described annular rotary table 33, and by described bearing arrangement, described annular rotary table 33 can around central rotation.
On the sidewall of described annular rotary table 33, be provided with the grinding tooth band (not shown) around described annular rotary table 33 center.Described main body rack 100 is provided with motor 51, driven wheel 52 is equipped with in the rotating shaft of described motor 51, the grinding tooth of described driven wheel 52 engages with the grinding tooth band on described annular rotary table 33 sidewall.During use, described motor 51 drives described driven wheel 52 to rotate, thus drives described annular rotary table 33 to rotate.
It should be noted that, grinding tooth band on described annular rotary table 33, with the bearing arrangement for being connected annular rotary table 33 along described A to, be positioned at the diverse location of described annular rotary table 33 sidewall, the grinding tooth band on described annular rotary table 33 and described bearing arrangement be independent of each other.Particularly, in the present embodiment, on the sidewall of described annular rotary table 33, the grinding tooth band of annular rotary table 33 is positioned at above the inner ring of described bearing arrangement.
In conjunction with reference to shown in figure 3 and Fig. 5, on described annular rotary table 33, offer along described A to the opening 34 running through described annular rotary table 33, each blade of described first blade mechanism 30 is positioned at the periphery of described opening 34.
Particularly, described first blade mechanism 30 comprises in two groups of blade assemblies 31 and 32, Fig. 5, and described two groups of blade assemblies are along B to the relative both sides being positioned at described opening 34.
Wherein, each is organized described blade assembly and comprises mounting bracket, and is arranged on the more blades on described mounting bracket.As in Fig. 5, described blade assembly 31 comprises mounting bracket 61, and is arranged on the more blades 62 on described mounting bracket 61; Described blade assembly 32 comprises mounting bracket 71, and is arranged on the more blades 72 on described mounting bracket 71.More blades 62 on described blade assembly 31 and more blades 72 end on blade assembly 32 are oppositely arranged, and it is wild that the region formed between more blades 62 and 72 forms described first radiation.
In the present embodiment, each organize each blade on described blade assembly 31 and 32 along perpendicular to B to (namely along the closure of described blade assembly 31 and blade assembly 32) arranged in parallel.And described every a slice blade 62 and 72 all can along described B to independent movement.By adjusting the shift position of each blade, to adjust the wild structure of described first radiation.The structure controlling the independent movement of each blade 62 or 72 is this area mature technology, does not repeat them here.
In the present embodiment, shown in figure 5, described annular rotary table 33 is provided with leading screw driven unit, to control described blade assembly 31 along B to movement.Particularly, the mounting bracket 61 of described blade assembly 31 is provided with nut 82, on described annular rotary table 33, the side being positioned at described mounting bracket 61 is provided with leading screw 81, structure and described nut 82 structure of described leading screw 81 match, described leading screw 81 is arranged in the screw of described nut 82, and on described annular rotary table 33, motor 83 is equipped with in the one end being positioned at described leading screw 81.Described motor 83 drives described leading screw 81 to rotate, thus drives described nut 82 moving axially along described leading screw 81, and then drives described blade assembly 31 moving axially along described leading screw 81.
In the present embodiment, described annular rotary table 33 is provided with another set of leading screw driven unit to control described blade assembly 32 along B to movement.Described another set of leading screw driven unit structure is similar to driving the leading screw driven unit structure of described blade assembly 31, does not repeat them here.
In the present embodiment, described two overlap leading screw driven units as drive unit, to control described two groups of blade assemblies 31 and 32 respectively independently along B to movement.
In use, can the shape at radiation position as required, first by described two cover leading screw driven units, control blade assembly 31 and 32 described in two groups respectively individually along B to movement, first step adjustment is carried out to each leaf position on each group of blade assembly 31 and 32; Afterwards, then control independently moving of each blade on described two groups of blade assemblies (comprising blade assembly 31 and 32), to carry out the second step adjustment of each leaf position.Technique scheme, effectively can reduce the process that each blade needs movement separately, correspondingly can simplify the structure of multi-diaphragm collimator, effectively can improve the convenient degree of the conformal degree adjustment of the first radiation open country in addition.
In possibility, in conjunction with reference to shown in figure 4 and Fig. 5, described annular rotary table 33 is provided with two along B to the guide rail 91 and 92 extended.Described mounting bracket 61 and 71 is arranged on described guide rail 91 and 92 respectively, thus improves described blade assembly 31 and 32 the moving stability.
Continue with reference to shown in figure 3 and Fig. 4, in the present embodiment, described second blade mechanism 40 comprises the shaft collar 43 be fixed on described main body rack 100.The more blades of described second blade mechanism 40 is positioned on described shaft collar 43.
In the present embodiment, described shaft collar 43 is parallel to described annular rotary table 33.
In the present embodiment, the structure of described shaft collar 43 and the similar of described annular rotary table 33.Comprise: along described A to the opening running through described shaft collar 43, each blades installation of described second blade mechanism is at the periphery of described opening.
In the present embodiment, suppose described radioactive source along A to, be positioned at the top of described annular rotary table 33, and described annular rotary table 33 is positioned at above described shaft collar 43.Aperture area on described shaft collar 43 is more than or equal to the area of the opening 34 on described annular rotary table 33, that is, described annular rotary table 33 opening and along A to projection be positioned at the opening range of described shaft collar 43.
In the present embodiment, described second blade mechanism 40 equally also can be divided into two groups of blade assemblies, and described two groups of blade assemblies lay respectively at the relative both sides of the opening of described shaft collar 43.Each group blade assembly comprises mounting bracket, and is arranged on the more blades on described mounting bracket.More blades on described mounting bracket can perpendicular to the closure arranged in parallel of two groups of blade assemblies on described shaft collar 43, and each blade can move along the closure of the described two groups of blade assemblies on described shaft collar 43 independently.
And two cover leading screw driven units can be set on described shaft collar 43, move along both closure to control described two groups of blade assemblies on described shaft collar 43 respectively.
In addition, described shaft collar 43 can be established guide rail that two closures along two groups of blade assemblies on described shaft collar 43 extend equally, and two groups of blade assemblies on described shaft collar 43 lay respectively on described two guide rails.
Structure on above-mentioned shaft collar 43 is similar to the structure on above-mentioned annular rotary table 33, does not repeat them here.
In conjunction with reference to shown in figure 6, in use, described first blade mechanism 30 rotates to relative to the second blade mechanism 40 around A, thus each blade of described first blade mechanism 30 is rotated to relative to described second blade mechanism 40 around A, adjust the position of each blade on described first blade mechanism 30.On the basis of the second radiation open country that the second blade mechanism 40 is formed, described second radiation open country is modified, to improve the conformal degree of the radiation open country of final molding.
Alternatively, in the present embodiment, when the moving direction of each blade on described shaft collar 43 is parallel to the moving direction of the blade on described annular rotary table 33, the blade on described annular rotary table 33 and the blade on described shaft collar 43 along A to, in being staggered.During use, along A to the blade of described first blade mechanism 30 and the blade of the second blade mechanism 40 at least partly in being staggered.Each blade on second blade mechanism 40 effectively can block the gap on described first blade mechanism 30 between adjacent blades; Each blade on same first blade mechanism 30 effectively can block the gap on described second blade mechanism 40 between adjacent blades.
Adopt the structure multi-diaphragm collimator of twi-tier blade, compared to the multi-diaphragm collimator of the blade construction of individual layer, under identical conformal degree requires, the thickness of each blade can be effectively reduced, and the quantity of blade.Thus reduce the manufacture craft of each blade, and the corresponding blade supporting structure design such as the drives structure of such as blade.
It should be noted that in the present embodiment, is the structure of twi-tier blade, vertically, rotatable described first blade mechanism is positioned at above described second blade mechanism, and in other embodiments except the present embodiment, described second blade mechanism also can be positioned at above described first blade mechanism;
In other twi-tier blade structures in other enforcements except the present embodiment, two-layer blade mechanism also all can be rotary structure, and concrete structure can with reference to described first blade mechanism 30 in the present embodiment;
Moreover, in the present invention, except twi-tier blade structure; also can comprise more than two-layer multiple layers of vanes structure, as three layers or four layers, wherein; at least one deck blade mechanism is that rotary structure just can realize the object of the invention, and these simply change all in protection scope of the present invention.
Although the present invention discloses as above, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (11)
1. a multi-diaphragm collimator, is characterized in that, comprising:
Main body rack;
Be arranged on described main body rack, and along first direction arrange the first blade mechanism and the second blade mechanism;
Described first blade mechanism comprises more blades, wild for the formation of the first radiation;
Described second blade mechanism comprises more blades, wild for the formation of the second radiation;
Described first blade mechanism is around the second axial-rotation, and described second is axially parallel to described first direction;
Described first radiation open country and the wild small part that is projected to along described second axis of the second radiation overlap.
2. multi-diaphragm collimator according to claim 1, is characterized in that, described first blade mechanism comprises annular rotary table, and the blades installation of described first blade mechanism is on described annular rotary table;
The sidewall of described annular rotary table is provided with grinding tooth band;
On described main body rack, the side being positioned at described annular rotary table is provided with driven wheel, and the grinding tooth of described driven wheel engages with the grinding tooth band of described annular rotary table;
Described main body rack is provided with the motor for driving described pinion rotation.
3. multi-diaphragm collimator according to claim 2, is characterized in that, on described annular rotary table, offer the opening axially running through described annular rotary table along described second, the blade of described first blade mechanism is positioned at described open circumferential.
4. multi-diaphragm collimator according to claim 3, is characterized in that, described first blade mechanism comprises two groups of blade assemblies, and described two groups of blade assemblies are positioned at the relative both sides of described opening;
One group of blade assembly comprises mounting bracket, and is arranged on the more blades on described mounting bracket;
Described first blade mechanism also comprises for controlling described two groups of blade assemblies independently along the drive unit of the closure movement of described two groups of blade assemblies.
5. multi-diaphragm collimator according to claim 4, is characterized in that, described drive unit comprises the leading screw driven unit that two covers are respectively used to control described two groups of blade assembly movements;
A set of described leading screw driven unit comprises the nut be fixed on corresponding mounting bracket, be fixed on leading screw on described annular rotary table and motor;
The closure being axially parallel to described two groups of blade assemblies of described leading screw;
Described nut is arranged on described leading screw, and described motor, for driving described leading screw around axial-rotation, moves along the axis of described leading screw to drive described nut.
6. multi-diaphragm collimator according to claim 4, it is characterized in that, in described two groups of blade assemblies, more blades on each group blade assembly is perpendicular to the closure arranged in parallel of described two groups of blade assemblies, and each described blade can move along the closure of described two groups of blade assemblies independently.
7. multi-diaphragm collimator according to claim 4, is characterized in that, described annular rotary table is provided with the guide rail that the closure along described two groups of blade assemblies extends;
Described mounting bracket is positioned on described guide rail, and described mounting bracket can move along described guide rail bearing of trend.
8. multi-diaphragm collimator according to claim 7, is characterized in that, described annular rotary table is provided with two described guide rails, and described two groups of blade assemblies lay respectively on described two guide rails.
9. multi-diaphragm collimator according to claim 2, is characterized in that, described annular rotary table is connected by bearing arrangement with main body rack.
10. multi-diaphragm collimator according to claim 1, it is characterized in that, when the blade of described second blade mechanism is parallel with the blade on the first blade mechanism, the blade on the blade of described second blade mechanism and the first blade mechanism along described first direction in being staggered.
11. multi-diaphragm collimators according to claim 2, is characterized in that, described second blade mechanism comprises and is fixed on shaft collar on described main body rack, and each blades installation of described second blade mechanism is on described shaft collar;
Described shaft collar is parallel with described annular rotary table.
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| CN105833429A (en) * | 2015-12-30 | 2016-08-10 | 上海联影医疗科技有限公司 | Irradiation method and device for fluence distribution including zero fluence region |
| CN107149727A (en) * | 2017-07-03 | 2017-09-12 | 上海联影医疗科技有限公司 | Multi-leaf optical grating |
| CN108594450A (en) * | 2018-06-27 | 2018-09-28 | 中国原子能科学研究院 | A kind of adjustable circular hole collimator |
| CN108778138A (en) * | 2016-02-05 | 2018-11-09 | 韩国威泰有限公司 | X-ray collimator and use its x-ray imaging equipment |
| CN109316199A (en) * | 2018-09-18 | 2019-02-12 | 上海联影医疗科技有限公司 | A kind of collimator filter assemblies, collimator and Medical Devices |
| WO2021087681A1 (en) * | 2019-11-04 | 2021-05-14 | 新里程医用加速器(无锡)有限公司 | Cone-beam-based helical volumetric modulated radiation therapy device and image system |
| CN113063807A (en) * | 2021-03-12 | 2021-07-02 | 梅特勒-托利多(常州)测量技术有限公司 | Ray light field adjusting mechanism and ray imaging device |
| CN113082552A (en) * | 2020-04-15 | 2021-07-09 | 上海联影医疗科技股份有限公司 | System and method for adjusting multi-leaf collimator |
| CN113663230A (en) * | 2021-07-27 | 2021-11-19 | 上海联影医疗科技股份有限公司 | Collimator and treatment head with same |
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